2>2 LICHENS OF THE STATE OF WASHINGTON 



attached to the substratum by rhizoids. Apothecia disciform, marginal or 

 scattered over the upper surface, immersed to sessile, lecanorine or biato- 

 rine; asci 8-spored; spores hyaline, nonseptate or 1-3-septate. 

 Alga Nostoc, Scytonema, Gloeocapsa, or Protococcus. 



A. Thallus definitely foliose throughout, veins prominent 25. Hydrothyria 



A. Thallus not definitely foliose throughout, veins not prominent. 

 B, Alga is a blue-green. 



C. Spores septate, alga Scytonema and Gloeocapsa 23. Massalongia 



C. Spores nonseptate, alga Gloeocapsa. 



D. Lecanorine 22. Pannaria 



D. Biatorine 21. Parmeliella 



B. Alga is a green 24. Psoroma 



21. Parmeliella Miill. Arg. Mem. Soc. Phys. et Hist. Nat. Geneve. 



16:376. 1862. 



Thallus crustose or squamulose, almost foliose at the periphery, pseudo- 

 parenchymatous cortex well developed on the upper surface only, definite 

 algal and medullary layers; a dark hypothallus present. Apothecia disci- 

 form, immersed to adnate ; proper margin present, thalline margin absent ; 

 hypothecium hyaline or faintly colored; paraphyses unbranched; asci 

 8-spored, hyaline, nonseptate. 



Alga Gloeocapsa. 



A. Thallus a mass of steel-blue or slate-blue (R) granules, sterile. 



1. P. cyanolepra 

 A. Thallus not as above, squamulose. 



B. Margins of squamules warty or sorediate 2. P. lepidiota 



B. Margins of squamules not warty or sorediate, but often lighter in color. 



3. P. microphylla 



1. Parmeliella cyanolepra (Tuck.) Herre, Proc. Wash. Acad. Sci. 12:151. 

 1910. 



Pannaria cyanolepra Tuck. Lich. Calif. 17. 1866. Pannaria lepidiota 

 var. cyanolepra Tuck. 



Thallus a mass of steel-blue to slate-blue (R) granules; the writer has 

 studied no fruiting material collected in this state. The following description 

 was made from Tuckerman's Type 4626 (F) : apothecia 0.5-1.0 mm. in 

 diameter, immersed to adnate ; disk dark reddish brown to black, flat becom- 

 ing convex and excluding the thin proper margin; hypothecium hyaline; 

 spores hyaline; ellipsoid, nonseptate, 8-10 x 14-21 yi. 



On moss, soil, or rock : Chelan Co. : 2186 ft., 1931, 1077. Columbia Co. : 

 Blue Mountains, 3500 ft., 1931, 1630. Whatcom Co.: Sumas Mountain, 

 1800 ft., Herre (1917). 



2. Parmeliella lepidiota (Somrft.) Wainio Term. Fuz., 22:308. 1899. 

 Lecidea carnosa var. lepidiota Somrft, Suppl. Fl. Lappon. 174, 1826. 

 Pannaria lepidiota (Somrft.) Th, Fr. 



